双心四角形
出典: フリー百科事典『ウィキペディア（Wikipedia）』 (2024/07/16 08:15 UTC 版)
双心四角形（そうしんしかっけい、英: Bicentric Quadrilateral, chord-tangent, quadrilateralinscribed and circumscribed quadrilateral[1]）とは外接円と内接円の両方をもつ四角形のことである。双心多角形の一種。
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- ^ Bogomolny, Alex, Collinearity in Bicentric Quadrilaterals [5], 2004.
- ^ L. V. Nagarajan, Bi-centric Polygons, 2014, [6].
- ^ Crux Mathematicorum 34 (2008) no 4, p. 242.
- ^ Alexey A. Zaslavsky, One property of bicentral quadrilaterals, 2019, [7]
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